Designation: A 202/A 202M 03
Standard Specification forPressure Vessel Plates, Alloy Steel,
Chromium-Manganese-Silicon 1
This standard is issued under the fixed designation A 202/A
202M; the number immediately following the designation indicates
the yearof original adoption or, in the case of revision, the year
of last revision. A number in parentheses indicates the year of
last reapproval.A superscript epsilon (e) indicates an editorial
change since the last revision or reapproval.
1. Scope*
1.1 This specification2 covers chromium-manganese-siliconalloy
steel plates, intended particularly for welded boilers andother
pressure vessels.
1.2 Plates under this specification are available in twogrades
having strength levels as follows:
GradeTensile Strength
ksi [MPa]A 7595 [515655]B 85110 [585760]
1.3 The maximum thickness of plates is limited only by
thecapacity of the composition to meet the specified
mechanicalproperty requirements; however, current practice
normallylimits the maximum thickness of plates furnished under
thisspecification to 2 in. [50 mm].
1.4 Grade A is suitable for rivets and when so used the
barsshall be subject to the requirements for rolled bars specified
inSpecification A 31, except for the chemical and
mechanicalrequirements.
1.5 The values stated in either inch-pound units or SI unitsare
to be regarded separately as standard. Within the text, theSI units
are shown in brackets. The values stated in eachsystem are not
exact equivalents. Therefore, each system mustbe used independently
of the other. Combining values from thetwo systems may result in
nonconformance with this specifi-cation.
2. Referenced Documents
2.1 ASTM Standards:A 20/A 20M Specification for General
Requirements for
Steel Plates for Pressure Vessels3
A 31 Specification for Steel Rivets and Bars for Rivets,Pressure
Vessels4
A 435/A 435M Specification for Straight-Beam
UltrasonicExamination of Steel Plates3
A 577/A 577M Specification for Ultrasonic Angle-BeamExamination
of Steel Plates3
A 578/A 578M Specification for Straight-Beam
UltrasonicExamination of Plain and Clad Steel Plates for
SpecialApplications3
3. General Requirements and Ordering Information
3.1 Plates supplied to this product specification shall con-form
to Specification A 20/A 20M, which outlines the testingand
retesting methods and procedures, permissible variationsin
dimensions and mass, quality and repair of defects,
marking,loading, etc.
3.2 Specification A 20/A 20M also establishes the rules
forordering information that should be complied with whenpurchasing
plates to this specification.
3.3 In addition to the basic requirements of this
specifica-tion, certain supplementary requirements are available
whereadditional control, testing, or examination is required to
meetend use requirements.
3.4 The purchaser is referred to the listed
supplementaryrequirements in this specification and to the detailed
require-ments in Specification A 20/A 20M.
3.5 Coils are excluded from qualification to this specifica-tion
until they are processed into finished plates. Platesproduced from
coil means plates that have been cut toindividual lengths from
coil. The processor directly controls, oris responsible for, the
operations involved in the processing ofcoils into finished plates.
Such operations include decoiling,leveling, cutting to length,
testing, inspection, conditioning,heat treatment (if applicable),
packaging, marking, loading forshipment, and certification.
NOTE 1For plates produced from coil and furnished without
heattreatment or with stress relieving only, three test results are
reported foreach qualifying coil. Additional requirements regarding
plates from coilare described in Specification A 20/A 20 M.
3.6 If the requirements of this specification are in
conflictwith the requirements of Specification A 20/A 20M, the
re-quirements of this specification shall prevail.
1 This specification is under the jurisdiction of ASTM Committee
A01 on Steel,Stainless Steel, and Related Alloys and is the direct
responsibility of SubcommitteeA01.11 on Steel Plates for Boilers
and Pressure Vessels.
Current edition approved Sept. 10, 2003. Published October 2003.
Originallyapproved in 1937. Last previous edition approved in 1999
as A 202/A 202M 93(1999).
2 For ASME Boiler and Pressure Vessel Code applications, see
related Specifi-cation SA-202/SA-202M in Section II of that
Code.
3 Annual Book of ASTM Standards,Vol 01.04.4 Annual Book of ASTM
Standards, Vol 01.08.
1
*A Summary of Changes section appears at the end of this
standard.
Copyright ASTM International, 100 Barr Harbor Drive, PO Box
C700, West Conshohocken, PA 19428-2959, United States.
4. Materials and Manufacture
4.1 Steelmaking PracticeThe steel shall be killed.
5. Heat Treatment
5.1 Plates are normally supplied in the as-rolled condition.The
plates may be ordered normalized or stress relieved, orboth.
6. Chemical Requirements6.1 The steel shall conform to the
chemical requirements
given in Table 1.
7. Mechanical Requirements7.1 Tension Test RequirementsThe
plates, as represented
by the tension test specimens, shall conform to the
require-ments given in Table 2.
SUPPLEMENTARY REQUIREMENTS
Supplementary requirements shall not apply unless specified in
the purchase order.A list of standardized supplementary
requirements for use at the option of the purchaser is included
in Specification A 20/A 20M. Those that are considered suitable
for use with this specification arelisted below by title.
S1. Vacuum Treatment,S2. Product Analysis,S3. Simulated
Post-Weld Heat Treatment of Mechanical
Test Coupons,S4.1 Additional Tension Test,S5. Charpy V-Notch
Impact Test,S6. Drop Weight Test,S7. High-Temperature Tension
Test,
S8. Ultrasonic Examination in accordance with Specifica-tion A
435/A 435M,
S9. Magnetic Particle Examination,
S11. Ultrasonic Examination in accordance with Specifica-tion A
577/A 577M, and
S12. Ultrasonic Examination in accordance with Specifica-tion A
578/A 578M.
TABLE 1 Chemical Requirements
Elements Composition, %
Grade A Grade B
Carbon, maxA 0.17 0.25Manganese:
Heat analysis 1.051.40 1.051.40Product analysis 0.971.52
0.971.52
Phosphorus, maxA 0.035 0.035Sulfur, maxA 0.035 0.035Silicon:
Heat analysis 0.600.90 0.600.90Product analysis 0.540.96
0.540.96
Chromium:Heat analysis 0.350.60 0.350.60Product analysis
0.310.64 0.310.64
A Applies to both heat and product analyses.
TABLE 2 Tensile Requirements
Grade A Grade B
ksi [MPa] ksi [MPa]
Tensile strength 7595 [515655] 85110 [585760]Yield strength,
minA 45 [310] 47 [325]Elongation in 8 in. [200
mm], min, %B16 15
Elongation in 2 in. [50mm], min, %B
19 18
A Determined by either the 0.2 % offset method or the 0.5 %
extension-under-load method.B See Specification A 20/A 20M for
elongation adjustments.
A 202/A 202M 03
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SUMMARY OF CHANGES
Committee A01 has identified the location of selected changes to
this standard since the last issue (A 202/A202M 93 (1999)) that may
impact the use of this standard.
(1)Added 3.5 and Note 1 to be consistent with the terminologyand
requirements of Specification A 20/A 20M.
(2) 3.3 was revised to be more general.
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responsible technical committee and must be reviewed every five
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A 202/A 202M 03
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